From what I've heard, dentistry isn't so bad. Even though it is a 5-year course like medicine, it is quicker to get a job since you do not need to specialise and train for as long after you graduate. The course structure (maybe depending on which University you go to) might also be more interesting than medicine, because I think dental students begin meeting patients and get involved in more practical aspects earlier on in the course.
It could depend on where you are studying I guess, because different institutions may have varying standards of education.
There was a thread about personal statements here:
Although it didn't get many replies... but Insha'Allaah, for all those who need help on this, anyone with info can offer advice there.
There was also an Islamic forum for all people involved in, and thinking of going into, healthcare, which somebody mentioned a while ago. It seems to have been revamped last time I checked: